For the second time in 15 months, Fleming has torn the anterior cruciate ligament in his left knee, an injury that also caused him to miss his 2012 rookie season. He appeared to aggravate that knee during a June 4 practice, and he opened training camp on the active/physically-unable-to-perform list.

A fifth-round draft pick last year out of Notre Dame, Fleming will be waived/injured.

Johnson, who played defensive end in college, was the Western Athletic Conference defensive player of the year last season and led San Jose State with 13 sacks and 21 1/2 tackles for loss. He is the school's all-time leader in sacks with 31, a total which is also a WAC career record.

Spartan defensive end Travis Johnson , 43, during practice at Spartan Stadium San Jose, Calif. on Thursday, Dec. 13, 2012. The Spartans will play in the Military Bowl on Dec. 27 in Washington D.C.(John Green/Staff)
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JOHN GREEN
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"Time to start a new journey in my life," Johnson posted on his Facebook page Monday night. "Playing football in the NFL for the San Francisco 49ers. Thanks for all the support and love. Now time to get to work!"

Johnson donned No. 56 as he took the practice field Tuesday morning with the 49ers.

"I'll take anything as long as I get to camp and get to show my stuff. That's all that matters," Johnson said at his pro-day workout in March. "Let me show you how I can play football, not how I can jump or run. I've never been a bad football player. I've always been able to play."

Johnson (6-foot-2, 245 pounds) also is San Jose State's career leader in tackles for loss (46 1/2). He played high school ball 4 miles away from the 49ers facility at King's Academy in Sunnyvale. San Jose State is some 12 miles.